This name is a synonym of Begonia pensilis L.B.Sm. & Wassh..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 362600) with original publication details: Symb. Antill. 7: 7 1911.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:30812-2.
This name was in version 1 of The Plant List, record kew-362600, and has not been changed.